package utils

import "math/rand"

func RandMapKey(m map[string]string) string {
	mapKeys := make([]string, 0, len(m)) // pre-allocate exact size
	for key := range m {
		mapKeys = append(mapKeys, key)
	}
	return mapKeys[rand.Intn(len(mapKeys))]
}

// MapKey 知道值 拿第一个key
func MapKey(m map[string]string, value string) (string, bool) {
	for k, v := range m {
		if v == value {
			return k, true
		}
	}
	return "", false
}